Castrol GTX 15W-40 A3/B3 Mineral Engine Oil - 4 Litres (15F628)

Castrol GTX 15W-40 A3/B3 – Premium Mineral Engine Oil

Helps to extend engine life by protecting against harmful sludge

Older engines and higher-mileage vehicles are more vulnerable to engine sludge – a thick, tar-like residue that can block oil flow, reduce performance, and even cause serious damage.

Castrol GTX 15W-40 A3/B3 is specially formulated with 3X Clean technology to capture, control, and clean away sludge deposits. In fact, it keeps engines up to 35% cleaner than industry standards, helping your engine run smoother, last longer, and deliver reliable performance.

Key Benefits

Fights and prevents harmful engine sludge – 35% cleaner than industry limits.
3X Clean Technology:
- Capture – surrounds and traps harmful particles.
- Control – prevents sludge from spreading or sticking to surfaces.
- Clean – removes existing deposits during oil change.
Prolongs engine life by protecting critical components.
Maintains performance in older vehicles and high-mileage engines.
Provides excellent protection against wear and deposits.

Why Sludge Happens

Engine sludge can form when:

High operating temperatures break down oil, combining with contaminants.
Moisture, unburnt fuel, and other impurities react with oil.
Frequent short trips prevent the oil from fully warming and burning off contaminants.

Specifications & Approvals

ACEA A3/B4
API SP
VW 501.01 / 505.00
Fiat 9.55535-D2
Meets MB-Approval 229.1

Ideal for:
Drivers of older or higher-mileage petrol and diesel engines who want extra protection against sludge and improved engine cleanliness.